Can't get rid of WinBitCoinMiner-CA (trj) by Avast antivirus program in Windows 7? What is this Trojan Horse doing in the computer, why does it so hard to. Need help removing the trojan known as "btccashwiki.com" or "Win BitCoinMiner- CA". Would love some help with this, i already had avast. Information about WinBitCoinMiner-CA WinBitCoinMiner-CA is a BitCoin Miner trojan virus that can break into a PC without asking permission and then.